Patent US5209969A successfully refreshed from Google Patents.
US5209969A
Expired / Lapsed
US
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Carbamate/urethane composition and textile lamination process
Assignee: W.L. Gore and Associates Inc
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Filing: 1992-02-07
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Granted: 1993-05-11
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Expires: 2012-02-07
Abstract
Abstract A storage stable adhesive mixture of hexamethylenediamine carbamate and the reaction product of ethylene/propylene oxide polyol and a polyurethane prepolymer of diphenyl methane diisocyanate, polytetramethylene glycol, and optionally, 1,4-butanediol; and a process for using the adhesive to laminate fabric to polymeric membrane is also described.
Inventors
- 👤 Glenn W. Crowther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:27
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B32B7/00; B32B7/04; B32B7/12; B32B27/32; B32B27/322; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/12; C09; C09J; C09J175/00; C09J175/04; C09J175/08; B32B2262/00; B32B2262/02; B32B2262/0276; B32B2305/00; B32B2305/02; B32B2305/026; B32B2307/00; B32B2307/70; B32B2307/724; B32B2307/726; B32B2307/7265; B32B2327/00; B32B2327/12; B32B2327/18; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249984; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31551
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
Process for laminating a fabric to a polymeric membrane, which comprises A) applying a storage stable adhesive mixture of a) hexamethylenediamine carbamate, and b) the reaction product of i) ethylene/propylene oxide polyol, and ii) a polyurethane prepolymer of a) diphenyl methane diisocyanate b) polytetramethylene glycol, and optionally, c) 1,4-butanediol to a fabric, B) causing the membrane to be placed against the fabric on the side the mixture is on, C) heating the resulting combination at 150°-180° C. whereby the heat causes the carbamate to decompose forming hexamethylenediamine and releasing CO 2 which causes foaming and forces the composition to spread, and which causes the hexamethylenediamine to react with --NCO groups of said reaction product.
Claim 2
Dependent Claim
114 words
Process for laminating a fabric to a polymeric membrane, which comprises A) applying a storage stable adhesive mixture of a) hexamethylenediamine carbamate, and b) the reaction product of i) ethylene/propylene oxide polyol, and ii) a polyurethane prepolymer of a) diphenyl methane diisocyanate b) polytetramethylene glycol, and optionally, c) 1,4-butanediol to a fabric, B) causing the membrane to be placed against the fabric on the side the mixture is on, C) heating the resulting combination at 150°-180° C. whereby the heat causes the carbamate to decompose forming hexamethylenediamine and releasing CO 2 which causes foaming and forces the composition to spread, and which causes the hexamethylenediamine to react with --NCO groups of said reaction product.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein the polymeric membrane is expanded microporous polytetrafluoroethylene.
Claim 4
Dependent Claim
22 words
The process of claim 2 wherein the fabric is a lint fabric held in a stretched condition during steps B and C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-10 | 1996-11-09 | 1997-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-10 | 2000-11-09 | 2001-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-10 | 2004-11-09 | 2005-05-11 | $7700.00 | Window Closed / Lapsed |